31140371240400 has 120 divisors (see below), whose sum is σ = 99815458085344. Its totient is φ = 8298898675200.

The previous prime is 31140371240393. The next prime is 31140371240417. The reversal of 31140371240400 is 404217304113.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6208306 + ... + 10041105.

Almost surely, 2^{31140371240400} is an apocalyptic number.

31140371240400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31140371240400 is an abundant number, since it is smaller than the sum of its proper divisors (68675086844944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31140371240400 is a wasteful number, since it uses less digits than its factorization.

31140371240400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16251029 (or 16251018 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

Adding to 31140371240400 its reverse (404217304113), we get a palindrome (31544588544513).

The spelling of 31140371240400 in words is "thirty-one trillion, one hundred forty billion, three hundred seventy-one million, two hundred forty thousand, four hundred".